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  <script>
    // 计算[2, 6, 18, 15, 40] 中能被3整除的偶数的个数
          let arr =[2, 6, 18, 15, 40]
          let arr2 =[]
             for(let i =0;i<arr.length;i++){
                    if(arr[i]%3 ===0 && arr[i]%2 ===0){
                          arr2.push(arr[i])
                    }
             }

               console.log(arr2.length);
  </script>
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